Mutton biodiesel has a high cetane number, excellent lubricity, and clean combustion, which improves engine efficiency and reduces CO and PM emissions. However, its cold flow properties are poor due to saturated fats, potentially causing filter clogging in cold weather. Solutions include blending with fossil diesel, using cold-flow additives, or winterization. Biodiesel produced using the GlobeCore USB system is clean, moisture-free, and compliant with ASTM D6751 and EN 14214, ensuring safe use in standard diesel engines without modification.